Impact of physisorbed species on transport properties of graphene

ORAL

Abstract

We have measured the impact of physisorbed species, including Argon, Krypton, Nitrogen, water and Benzene, on the transport properties of mechanically-exfoliated graphene sheets on SiO$_{2}$/Si in an ultra-high vacuum environment at temperatures near 30 K. We controlled the gas dosage down to the sub-monolayer level and found species-specific effects on the field-effect mobility of graphene. We observed the influence of different molecular sizes, molecular dipole moment, and intermolecular interactions. We will discuss our results in the context of recent theoretical calculations within the Boltzmann transport framework.

*Suported by ONR N000140610882, NSF CCF-06-34321 (MSF), NSF-UMD-MRSEC DMR 05-20471 and the MI is supported by the DCI Postdoctoral Fellowship program.

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Authors

  • Chaun Jang

    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Jianhao Chen

    • Dept. of Physics, University of Maryland, College Park, MD
    • University of Maryland
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Shudong Xiao

    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Masa Ishigami

    • Department of Physics and Materials Research Science and Engineering Center, University of Maryland, College Park, MD 20742

  • Ellen Williams

    • Department of Physics \& MRSEC, University of Maryland, College Park
    • Dept. of Physics, University of Maryland, College Park, MD
    • Dept. of Physics, University of Mayland, College Park,MD 20742-4111 USA
    • U. of Maryland, College Park
    • University of Maryland
    • University of Maryland, College Park
    • University of Maryland - College Park
    • Department of Physics and Materials Research Science and Engineering Center, University of Maryland, College Park, MD 20742

  • Michael Fuhrer

    • University of Maryland
    • Dept. of Physics, University of Maryland, College Park, MD
    • Dept. of Physics, University of Mayland, College Park,MD 20742-4111 USA
    • Mater. Res. Sci. and Eng. Ctr., Ctr. for Nanophys. and Adv. Mater., and Dept. of Phys., Univ. of MD, College Park, MD 20742
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742